Azolla /

Fairy moss

Parameters

Disclaimer: I got these levels by finding multiple sources and rounding the the numbers

3.5-10

Optimal: 5.5-6.5

GH:

0 - 18dgh / 0-320ppm

KH:

1-8dkh / 17-142ppm

Temperature:

59–82F / 15-27C

Info

Names:

Azolla

Fairy moss

Waterfern

Mosquito fern

Type:

Floating plant

Species:

Azolla caroliniana

Azolla cristata

Azolla filiculoides

Azolla microphylla

Azolla nilotica

Azolla mexicana

Azolla rubra

Azolla pinnata

Family:

Salviniaceae

Size:

Typical Diameter

1-2.5cm / .39-.98in

Typical root length:

1–3cm / 0.4–1.2in

Light:

Shade/partial shade

Feeds from:

Water column

Grows:

Very Fast

Difficulty:

Beginner/easy

Tech:

Doesn’t need CO2

Spawn time:

2-5 days

They send shoots out and grow a pup of of them.

Notes:

Eukarya - Domain of life whose cells have nuclei

Plantae - plants

Filicinophyta - ferns

Filicopsida - ferns, vascular plants

Salviniaceae - Family of ferns

Azollaceae - water ferns

Origin

They come from all over the world, and are currently invasive in most places.

https://permies.com/t/178418/grow-azolla

June 5-6 2026